Hanna pH Calibration Buffer Solution (500 mL)

Hanna Calibration Buffer Solutions are premium pH buffers in 500 mL bottles, standardized against NIST reference materials for accurate, repeatable pH meter calibration. Choose the 4.01 (acidic), 7.01 (neutral), or 10.01 (alkaline) buffer point, or stock all three for a full three-point calibration. Key features Standardized against NIST reference materials; accurate to ±0.01 pH @ 25°C Temperature-vs-pH chart printed on each bottle; lot number and expiration date marked Air-tight, tamper-proof bottle; dye-free; 5-year unopened shelf life Use with: all Hanna pH meters and electrodes (HI98199, HI2020, HI2209, HI6221, HI98129/HI98130, HI97745 and more). Browse meters in our Hanna WQ Meters collection. Estimated shipping weight: 1.3 lb per bottle.